From: Paolo Bonzini <address@hidden>
Add a bs->request_alignment field that contains the required
offset/length alignment for I/O requests and fill it in the raw block
drivers. Use ioctls if possible, else see what alignment it takes for
O_DIRECT to succeed.
While at it, also expose the memory alignment requirements, which may be
(and in practice are) different from the disk alignment requirements.
Signed-off-by: Paolo Bonzini <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
block.c | 3 ++
block/raw-posix.c | 102 ++++++++++++++++++++++++++++++++++++++--------
block/raw-win32.c | 41 +++++++++++++++++++
include/block/block_int.h | 3 ++
4 files changed, 132 insertions(+), 17 deletions(-)